Trying to determine headgasket compressed thickness

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I'm trying to determine the static compression on my kz750 twin. I have all the figures i need except the compressed head gasket thickness. Everything i have found says "consult manufacturer" for these numbers. My plan right now is to throw in a gasket, compress it and then measure the thickness of the copper rings that are embedded in it. Is this a good way to get this number?
 
Yes. Arguably, the gasket might be slightly more compressed under tension but it has to be negligible.

A better way is usually to measure the compressed volume using a burette, but that requires taking the head off and sealing the rings with grease and then bolting the head on and measuring and then getting the measuring fluid out.
 
Out of curiosity, given you have the uncompressed thickness of the gasket, if it were say compressed 50%, what would the difference in compression ratio be?

Just wondering what increase in precision getting the exact actual compressed thickness gives you.
 
25% compression would effect the compression ratio by about .3 not much
 
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